范文编号:SW176 范文字数:11295,页数:23 摘要:本文以对氯三氟甲苯为起始原料经“三段硝化”合成除草剂氟乐灵中间体3,5-二硝基-4-氯三氟甲苯的工艺制法进行讨论研究。对一硝化安排了正交试验,找到了最佳工艺条件,收率可达到97.5%。对两段二硝化分别做了单独硝化和套酸试验,也进行了连续式硝化的试验,转化率达到了要求。证明了三段硝化法对合成3,5-二硝基-4-氯三氟甲苯的工艺有了一定的改进。 Abstract: This paper to the chlorine trifluoromethyl toluene as the starting material by the "three of nitrification" synthetic herbicide trifluralin intermediate 3,5 - Nitro -4 - chlorine trifluoromethyl toluene system of law discussed. Arranged for a nitrification orthogonal experiment to find the optimum conditions. Second of two nitrification were done a separate set of nitrification and acid test, also had a continuous nitrification of the test, reached a conversion rate of demand. Three of the initial proof of the nitration of 3,5 - Nitro -4 - chlorine trifluoromethyl toluene Process Improvement better results. 目 录
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